< - for inbound communication, where the binding will listen for incoming messages from the Smarthomatic base station

> - for outbound communication, where the binding will send messages to the Smarthomatic base station

= - for two-way communication, where the binding both will send and receive messages.

<deviceId> is the senderId or the receiverId, depending on the direction of the message.

<messageGroupId> is the messageGroupId of the message

<messageId> is the messageId of the message

<messagePart> is the optional part that determines the part of a massageData part. For messages that contain multiple parts, for example HumidityTemperature or messageData that contains arrays.

<transformationrule> is the optional part, given if the message needs to be transformed. For example, if we need to divide by 100. It uses the transformation services that you have installed in openHAB 2.